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<head>
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>
       *{
           margin: 0;
           padding: 0;
           list-style: none;
       }

       a{
           text-decoration: none;
           font-size: 18px;
           color: #777;
       }

       ul{
            display: flex;
            width: 1210px;
            height: 48px;
            line-height: 48px;
            background-color: #E8E7E3;
            margin: 100px auto;
            text-align: center;

       }

       li{
           flex-grow: 1;
       }

       ul li a{
           display: block;
       }

       ul li:hover{
           background-color: #7777;
       }
    </style>
</head>
<body>
    <ul>
        <li><a href="#">HTML/CSS</a></li>
        <li><a href="#">Browser Side</a></li>
        <li><a href="#">Server Side</a></li>
        <li><a href="#">Programming</a></li>
        <li><a href="#">XML</a></li>
        <li><a href="#">Web Building</a></li>
        <li><a href="#">Reference</a></li>
    </ul>
</body>
</html>